Question

List the three major classes of carbohydrates and give a specific example of each. 2. Write the reaction (using words, not formulas) for the hydrolysis of sucrose. 3. Cellulose and amylose are both polysaccharides. What specific test can be used to differentiate between the two compounds? 4. What is the definition of a reducing sugar? 5. What purpose does the control test tube of water serve for the carbohydrate tests? Reminder: there is one more problem on the next page]

Answer 1

The three major classes of carbohydrates are (1) Monosacchari des (2) Oligosacchari des (3) Polys accharides (1) Monosacchai des There are the simple sugars which are formed by combining multiple polyhydroxy al dehydei dic units Example: Glucose (2) Oligosacchari des There are the sugars which are formed by combining short chains of Monosacchari dic units Each chain contains 2 to 20 Monosacchari dic units Example: sucrose, lactose and maltose (3) Polys accharides: There are the sugars which are formed by combining chains of Monosacchari dic units Each chain contains 20to 107 Monosaccharidic units Example: starch, chitin and glycogen